package com.sky.service.impl;


import ch.qos.logback.core.joran.util.beans.BeanUtil;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/**
 * @Author: XJH
 * @Description: TODO
 * @Date: 2025/6/4 18:33
 * @Version: 1.0
 */
@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * 新增菜品和相应的口味
     * @param dishDTO
     * @return
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        log.info("事物已开启...");
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        //向菜品表插入1条数据
      dishMapper.insert( dish);
      //获取insert语句生成的主键值   useGeneratedKeys="true" keyProperty="id"
        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0){

            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }


    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        //  Page<DishVO>每一个字段都是一个对象
       Page<DishVO> page= dishMapper.pageQuery(dishPageQueryDTO);
       return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除菜品
     * @param ids
     * @return
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        // 判断当前菜品是否能够删除--是否存在起售菜品？？
        for (Long  id: ids) {
         Dish dish=dishMapper.getById(id);
         if(dish.getStatus()== StatusConstant.ENABLE)
         {
             //当前菜品处于起售中，不能删除
             throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
         }
        }
        //判断当前菜品是否能够删除--是否被套餐关联了？？
        List<Long> setmealIds= setmealMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds!=null&&setmealIds.size()>0){
            //当前菜品被套餐关联了，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

//        //删除菜品表中的菜品数据
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            //删除菜品关联的口味数据
//            dishFlavorMapper.deleteByDishId(id);
//        }
        //优化后，sql语句的数量减少，性能提升
         //根据菜品id集合批量删除菜品数
        //sql: delete from dish where id in (?,?,?)
          dishMapper.deleteByIds(ids);
         //根据菜品id集合批量删除关联的口味数据
        //sql: delete from dish flavor where dish id in(?,?,?)
        dishFlavorMapper.deleteByDishIds(ids);

    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    @Override
    public DishVO getById(Long id) {
        //根据id查询菜品数据
        Dish dish= dishMapper.getById(id);
        //根据菜品id查询口味数据
      List<DishFlavor> dishFlavors= dishFlavorMapper.getByDishId(id);
        // 将查询到的数据封装vo
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }
    /**
     * 修改菜品
     * @param dishDTO
     * @return
     */
    @Transactional
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改菜品基本信息
       dishMapper.update(dish);
        //先删除原有数据再插入
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        //重新    遍历口味列表并设置菜品 ID
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    @Override
    public void startOrStop(Integer status, Long id) {
         Dish dish = Dish.builder()
                 .status(status)
                 .id(id)
                 .build();
                 dishMapper.update(dish);
                 log.info("修改菜品状态：{}",dish);
    }
}
